diff --git a/pyghmi/ipmi/private/spd.py b/pyghmi/ipmi/private/spd.py
index 143bf003..9217fb05 100644
--- a/pyghmi/ipmi/private/spd.py
+++ b/pyghmi/ipmi/private/spd.py
@@ -736,7 +736,7 @@ class SPD(object):
         self.info['manufacture_date'] = decode_spd_date(spd[120], spd[121])
         self.info['serial'] = hex(struct.unpack(
             '>I', struct.pack('4B', *spd[122:126]))[0])[2:].rjust(8, '0')
-        self.info['model'] = struct.pack('18B', *spd[128:146]).strip(
+        self.info['model'] = struct.pack('20B', *spd[128:148]).strip(
             b'\x00\xff ')
 
     def _decode_ddr4(self):
@@ -765,5 +765,5 @@ class SPD(object):
         self.info['manufacture_date'] = decode_spd_date(spd[323], spd[324])
         self.info['serial'] = hex(struct.unpack(
             '>I', struct.pack('4B', *spd[325:329]))[0])[2:].rjust(8, '0')
-        self.info['model'] = struct.pack('18B', *spd[329:347]).strip(
+        self.info['model'] = struct.pack('20B', *spd[329:349]).strip(
             b'\x00\xff ')